JPH04336969A - Manufacture of carbide abrasive grain edger - Google Patents

Abstract

PURPOSE:To enable abrasive grains mixedly contained in a metal bond layer to be uniformly distributed, and also to be constant in density in a carbide abrasive grain edger which is used as a truer truing a grinding wheel for grinding works or as a grinding stone. CONSTITUTION:The manufacture of a carbide abrasive grain edger consists of a process in which metal powder 10 is filled up in a circular recessed groove 2 provided for a metal mold 1, and a metal bond base 10a is formed with the metal powder pressed by a mold A so as to be sintered, a process in which each hole roughly equal in diameter to each abrasive grain 5 is formed in the metal bond base 10a while being processed in a specified pattern, and of a process in which carbide abrasive grains are disposed in each hole formed in the metal bond base 10a, so that metal powder 10 is filled up thereon while being pressed by a mold 4 so as to be sintered.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a super hard abrasive grain roll used as a true grinding wheel for a grinding machine or as the grinding wheel.

0002

[Prior Art] Conventionally, a method for manufacturing a grinding wheel for grinding or grinding using ultra-hard abrasive grains such as diamond or cubic boron nitride (CBN) has been carried out using an annular ring formed in a mold 1, as shown in FIG. The steel core 3 is loaded into the mold 1 so that the outer periphery of the steel core 3 corresponds to the inner periphery of the groove 2, and a mixed powder 6 is prepared by mixing metal powder such as tin and copper with ultra-hard abrasive grains 5. The metal powder is filled into the groove 2 and compressed by a pressing die 4, and the metal powder is sintered and solidified by firing, hot coining or hot pressing, and then shaped.
As shown in FIG. 7, a metal bond layer 7 in which ultra-hard abrasive grains 5 are mixed is formed on the outer periphery of the steel core 3.

0003

[Problems to be Solved by the Invention] However, in the case of the product manufactured by the above-mentioned conventional method, the distribution of the ultra-hard abrasive grains 5 mixed in the metal bond layer 7 is not uniform and is arranged randomly, as shown in FIG. It is formed with uneven distribution and irregular density. Therefore, the grinding wheel for grinding that is trued with such a truer may cause feed marks, and the dressing interval may become unstable, the grinding resistance may become unstable, and grinding burn, cracks, etc. may occur. . Furthermore, there are various problems such as the work being ground into a taper or an ellipse, resulting in poor cylindrical and roundness accuracy and deteriorating the quality of the ground surface.

0004

[Means for Solving the Problems] The present invention is a method for manufacturing an ultra-hard abrasive roll, which has been devised to solve the above-mentioned conventional problems. a step of filling the metal bond base with the abrasive grains and pressurizing it with a press mold to form a metal bond base; a step of processing holes in the metal bond base in a desired pattern arrangement with approximately the same diameter as the grain size of the abrasive grains; This process consists of placing ultra-hard abrasive grains in the holes of the metal bond base, filling them with metal powder, and pressurizing and firing them with a press mold.

[0005]

[Operation] By the above method, a hard abrasive grain roll can be obtained in which ultra-hard abrasive grains are arranged in a uniform distribution and at a constant density through holes formed in a metal bond base made by firing and solidifying metal powder.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. The method for manufacturing an ultra-hard abrasive roll according to the present invention can be broadly divided into three steps. That is, in the first step, as shown in FIG. It is sintered and solidified by pressurizing and firing, that is, hot coining or hot pressing. Thereby, as shown in FIG. 2, a ring-shaped metal bond base 10a is formed around the outer periphery of the steel core 3.

In the second step, as shown in FIG. 2, a metal bond base 10a is formed around the outer periphery of the steel core 3.
Holes 11 having approximately the same diameter as the abrasive grains are formed on the plate surface in a desired pattern arrangement. This hole processing can be performed using a drill or laser, and may be a through hole or a blind hole. Further, the required pattern arrangement may be arranged on a spiral line at a predetermined pitch as shown in FIG.
As shown in B), adjacent hole positions may be arranged at a predetermined pitch by shifting the phase of the holes.

In the third step, as shown in FIG. 3, metal powder 10 is filled onto the metal bond base 10a having the hole formed therein, and the metal powder 10 is pressed again with the press mold 4 and fired, that is, hot coining or hot It is sintered and solidified by pressing. As a result, the abrasive grains (diamond, CBN, etc.) 5 placed in the holes 11 are transferred to the metal bond base 1 which has been previously formed by sintering and solidifying the metal powder 10.
Both 0a and 0a are integrated.

The metal bond layer manufactured by the above method has a certain pattern based on the required pattern of the holes 11 formed in the second step in the metal bond base 10a formed in the first step. The abrasive grains are arranged with density and uniform distribution, and the particle size of the abrasive grains 5 is the same as that of the holes 11.
Since the grain size is determined by , the grain size is approximately constant. Note that the present invention is applicable not only to the production of grindstones for grinding workpieces, but also to the production of grindstones for grinding workpieces.

0010

Effects of the Invention As described above, the present invention includes the steps of filling an annular groove provided in a mold with metal powder and pressurizing the powder with a press mold to form a metal bond base; A process of processing holes in a metal bond base with approximately the same diameter as the abrasive grains in a desired pattern arrangement, placing super hard abrasive grains in the holes of the metal bond base and filling the metal powder thereon, To easily manufacture and mass-produce an ultra-hard abrasive roll in which the distribution of abrasive grains is uniform and the abrasive grains are arranged at an arbitrarily constant density by a method including a pressure firing process using a pressing mold. The material that positions and arranges the abrasive grains in the required pattern is made into a metal bond base by pressurizing and firing metal powder, which is an integral part of the manufacturing process, eliminating the need for a separate metal base such as a copper plate, and reducing manufacturing costs. This has the advantage of reducing the amount of water and solving the problems of grindstones or cutting wheels manufactured by conventional manufacturing methods.

[Brief explanation of drawings]

FIG. 1: Explanatory diagram of the first step according to the present invention

[Fig. 2] Explanatory diagram of the second step according to the present invention

FIG. 3: A third embodiment according to the present invention.
Explanatory diagram of the process

[Figure 4] Diagram showing an example of the pattern arrangement of holes drilled on the plate surface of the metal bond base

[Fig. 5] Explanatory diagram of the conventional manufacturing method

[Figure 6] Cross-sectional view of essential parts of a super hard abrasive roll manufactured by a conventional method

[Figure 7] Diagram showing the abrasive grain distribution state of a super hard abrasive roll manufactured by a conventional method

[Explanation of symbols]

1 Mold 2　Annular groove 3 Steel core 4　Press mold 5 Abrasive grains 10 Metal powder 10a Metal bond base 11 Hole

Claims (1)

[Claims] 1. A step of filling an annular groove provided in a mold with metal powder and firing it under pressure in a press mold to form a metal bond base, and adding abrasive grains to the metal bond base. A process of processing holes with approximately the same diameter in the required pattern arrangement, placing ultra-hard abrasive grains in the holes of the metal bond base, filling them with metal powder, and pressurizing and firing with a press mold. A method for manufacturing an ultra-hard abrasive roll comprising steps.